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641bb4394f
This is another flag that is statically set and doesn't need to use up
an FMODE_* bit. Move it to ->fop_flags and free up another FMODE_* bit.
(1) mem_open() used from proc_mem_operations
(2) adi_open() used from adi_fops
(3) drm_open_helper():
(3.1) accel_open() used from DRM_ACCEL_FOPS
(3.2) drm_open() used from
(3.2.1) amdgpu_driver_kms_fops
(3.2.2) psb_gem_fops
(3.2.3) i915_driver_fops
(3.2.4) nouveau_driver_fops
(3.2.5) panthor_drm_driver_fops
(3.2.6) radeon_driver_kms_fops
(3.2.7) tegra_drm_fops
(3.2.8) vmwgfx_driver_fops
(3.2.9) xe_driver_fops
(3.2.10) DRM_GEM_FOPS
(3.2.11) DEFINE_DRM_GEM_DMA_FOPS
(4) struct memdev sets fmode flags based on type of device opened. For
devices using struct mem_fops unsigned offset is used.
Mark all these file operations as FOP_UNSIGNED_OFFSET and add asserts
into the open helper to ensure that the flag is always set.
Link: https://lore.kernel.org/r/20240809-work-fop_unsigned-v1-1-658e054d893e@kernel.org
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Christian Brauner <brauner@kernel.org>
105 lines
2.6 KiB
C
105 lines
2.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0
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*
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* Copyright 2022 HabanaLabs, Ltd.
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* All Rights Reserved.
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*
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*/
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#ifndef DRM_ACCEL_H_
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#define DRM_ACCEL_H_
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#include <drm/drm_file.h>
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#define ACCEL_MAJOR 261
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#define ACCEL_MAX_MINORS 256
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/**
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* DRM_ACCEL_FOPS - Default drm accelerators file operations
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*
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* This macro provides a shorthand for setting the accelerator file ops in the
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* &file_operations structure. If all you need are the default ops, use
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* DEFINE_DRM_ACCEL_FOPS instead.
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*/
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#define DRM_ACCEL_FOPS \
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.open = accel_open,\
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.release = drm_release,\
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.unlocked_ioctl = drm_ioctl,\
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.compat_ioctl = drm_compat_ioctl,\
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.poll = drm_poll,\
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.read = drm_read,\
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.llseek = noop_llseek, \
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.mmap = drm_gem_mmap, \
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.fop_flags = FOP_UNSIGNED_OFFSET
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/**
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* DEFINE_DRM_ACCEL_FOPS() - macro to generate file operations for accelerators drivers
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* @name: name for the generated structure
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*
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* This macro autogenerates a suitable &struct file_operations for accelerators based
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* drivers, which can be assigned to &drm_driver.fops. Note that this structure
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* cannot be shared between drivers, because it contains a reference to the
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* current module using THIS_MODULE.
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*
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* Note that the declaration is already marked as static - if you need a
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* non-static version of this you're probably doing it wrong and will break the
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* THIS_MODULE reference by accident.
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*/
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#define DEFINE_DRM_ACCEL_FOPS(name) \
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static const struct file_operations name = {\
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.owner = THIS_MODULE,\
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DRM_ACCEL_FOPS,\
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}
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#if IS_ENABLED(CONFIG_DRM_ACCEL)
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void accel_core_exit(void);
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int accel_core_init(void);
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void accel_minor_remove(int index);
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int accel_minor_alloc(void);
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void accel_minor_replace(struct drm_minor *minor, int index);
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void accel_set_device_instance_params(struct device *kdev, int index);
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int accel_open(struct inode *inode, struct file *filp);
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void accel_debugfs_init(struct drm_device *dev);
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void accel_debugfs_register(struct drm_device *dev);
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#else
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static inline void accel_core_exit(void)
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{
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}
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static inline int __init accel_core_init(void)
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{
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/* Return 0 to allow drm_core_init to complete successfully */
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return 0;
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}
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static inline void accel_minor_remove(int index)
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{
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}
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static inline int accel_minor_alloc(void)
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{
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return -EOPNOTSUPP;
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}
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static inline void accel_minor_replace(struct drm_minor *minor, int index)
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{
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}
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static inline void accel_set_device_instance_params(struct device *kdev, int index)
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{
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}
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static inline void accel_debugfs_init(struct drm_device *dev)
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{
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}
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static inline void accel_debugfs_register(struct drm_device *dev)
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{
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}
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#endif /* IS_ENABLED(CONFIG_DRM_ACCEL) */
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#endif /* DRM_ACCEL_H_ */
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